BMW /5 motorcycles
Manufacturer | Suspension Modular | |
---|---|---|
Brakes | Front/Rear Drum Brake | |
Tires | 3.25x19 front • 4.00x18 rear | |
Wheelbase | 1385 mm | |
Dimensions | L: 2100 mm W: 850 mm H: 1040 mm | |
Weight | 462 lbs (wet) | |
Fuel capacity | 4.7 US gal |
![Black BMW R75/5](http://upload.wikimedia.org/wikipedia/commons/thumb/4/45/BMW_R75-5_r_TCE.jpg/300px-BMW_R75-5_r_TCE.jpg)
For the WWII-era motorcycle, see BMW R75
![Red BMW R60/5](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f7/Munich06-2_018_%28345606602%29.jpg/300px-Munich06-2_018_%28345606602%29.jpg)
The BMW R50/5, R60/5, and R75/5 form a range of
History
![Closeup of BMW roundel badge on a part-painted and polished chrome fuel tank side panel](http://upload.wikimedia.org/wikipedia/commons/thumb/4/44/R75-5-400.jpg/220px-R75-5-400.jpg)
![Black BMW R75/5](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a9/R75-800.jpg/300px-R75-800.jpg)
For the 1970 model year, BMW launched three new models having engine capacities of 500 cc (R50/5), 600 cc (R60/5), and 750 cc (R75/5). The R75/5 could reach 110 mph (177 km/h).[1][failed verification] Model year 1972 saw the introduction of the 15 L (3.3 imp gal; 4.0 US gal) rectangular tank with chrome side panels. For the second half of the 1973 model year, BMW lengthened the rear swingarm 2 inch (5 cm), resulting in the “long-wheelbase” (LWB) models mainly to improve the stability of the motorcycles at higher speeds and when loaded up. It also enabled a larger battery, while retaining the kick starter.
The /5 series was the first series to be manufactured completely in Berlin,[citation needed] as by 1969 all of Munich's production capacity was needed for automobiles. "Berlin with its well-trained workforce was an obvious choice. So in 1969 the Berlin Plant started production of the all-new BMW /5 Series, a completely new design and construction following a modular principle all the way from the suspension to the flat-twin power unit.[2]
In 1970, 12,287 units were manufactured and by July 1973, when the /5 model series reached the end production, a significant volume of 68,956 motorcycles had left the Berlin Plant, production increasing five-fold within three years. During this period, BMW manufactured its 500,000th.[2]
In 1974, BMW introduced the “/6” models, which offered front disc brake, revised instrumentation, and a five-speed transmission. The single disc brake was a hybrid cable/hydraulic system, whereby a cable from the handlebar lever actuated the master cylinder underneath the fuel tank. The rectangular tank was dropped.
All /5 models featured both electric starter and kickstarter,[3] with kickstarters remaining available on some BMW motorcycles up to model year 1980.
Technical data
![Top-down view of a black R75/5 showing that the cylinders which protrude out of each side of the bike are not directly opposite each other](http://upload.wikimedia.org/wikipedia/commons/thumb/0/04/R75-boxer.jpg/220px-R75-boxer.jpg)
The /5 models are air-cooled, four-stroke,
The 500 cc and 600 cc models are equipped with Bing slide-type carburetors with 26 mm throats. The R75/5 comes with 32 mm Bing CV (Constant Vacuum/constant depression) type carburetors.[4] As in all BMW motorcycles at the time, the clutch is a single-disk dry clutch.
Final drive is by shaft, running from the transmission by universal joint to an oil bath within the right rear swing arm and connecting to a bevel gear and ring gear on the other end. Unlike the /2 models (with the exception of the 1968-69 US models), the /5 models are equipped with telescopic front forks, 12-volt alternator and electrics, and standard tachometer and turn signals.
R 50/5 | R 60/5 | R 75/5 | |
---|---|---|---|
Bore | 67 mm (2.6 in) | 73.5 mm (2.89 in) | 82 mm (3.2 in) |
Stroke | 70.6 mm (2.78 in) | ||
Displacement | 498 cc (30.4 cu in) | 599 cc (36.6 cu in) | 749 cc (45.7 cu in) |
Power | 32 hp (24 kW) @ 6,800 rpm[citation needed] | 40 hp (30 kW) @ 6,600 rpm[citation needed] | 50 hp (37 kW) @ 6,400 rpm[citation needed] |
Torque | 29 ft⋅lbf (39 N⋅m) @ 5,000 rpm[citation needed] | 36 ft⋅lbf (49 N⋅m) @ 5,000 rpm[citation needed] | 43 ft⋅lbf (58 N⋅m) @ 5,000 rpm[citation needed] |
Top Speed | 87 mph (140 km/h)[citation needed] | 99 mph (159 km/h)[citation needed] | 110 mph (175 km/h)[citation needed] |
Curb Weight
|
452 lb (205 kg)[citation needed] | 463 lb (210 kg)[citation needed] | 463 lb (210 kg)[citation needed] |
Gross Weight Rating
|
881 lb (400 kg) | ||
Alternator | Bosch 12 V • 180 Watts | ||
Spark Plugs | Bosch W230T30 / Champion N7Y | ||
Fuel Tank | 4.7 US gal (18 L; 3.9 imp gal) or 6.3 US gal (24 L; 5.2 imp gal) | ||
Tires | 3.25x19 front • 4.00x18 rear | ||
Rims | 1.85x19 front • 1.85x18 rear |
Dimensions | Dimensions/Weights | |
Dimensions/Weights
Length x Width x Height |
Dimensions/Weights
2100 (from 1973: 2150) x 850 x 1040 mm (82.67 (84.64) x 33.46 x 40.94 in) | |
Dimensions/Weights
Wheel Base |
Dimensions/Weights
1385 mm / 54.52 in (from 1973: 1435 mm / 56.49 in) |
![Red BMW R75/5 motorcycle fitted with panniers, parked on grass by a lake with a city in the background](http://upload.wikimedia.org/wikipedia/commons/thumb/3/35/Right-3qtr-bagsmall.jpg/220px-Right-3qtr-bagsmall.jpg)
See also
References
- ^ "Home". eecs.umich.edu.
- ^ a b "Forty Years of BMW Motorcycle Production in Berlin-Spandau". Archived from the original on 2011-07-16. Retrieved 2009-06-22.
- ISBN 978-0-7603-1424-1.
- ^ Richard Backus (November–December 2009). "10 Days with a 1973 BMW R75/5". Motorcycle Classics. Archived from the original on 8 November 2009. Retrieved 2009-11-11.
External links
- /2 and /5 BMW kick starter gear information
- Motorcycle Classics article on 1973 BMW R60/5 Special Archived 2012-11-12 at the Wayback Machine
- R50/5, R60/5, and R75/5 specifications